Import of the contiki-2.x development code from the SICS internal CVS server

cpu/avr/dev/flash.c

@@ -0,0 +1,50 @@
+
+#include "dev/flash.h"
+
+#include <avr/boot.h>
+#include <inttypes.h>
+#include <avr/interrupt.h>
+#include <avr/pgmspace.h>
+
+/*---------------------------------------------------------------------------*/
+/*
+ * The following code was taken from the avr-libc manual:
+ */
+void
+flash_write_page(uint32_t page, uint8_t *buf)
+{
+  uint16_t i;
+  uint8_t sreg;
+
+  /* Disable interrupts. */
+
+  sreg = SREG;
+  cli();
+    
+  eeprom_busy_wait();
+
+  boot_page_erase(page);
+  boot_spm_busy_wait();      /* Wait until the memory is erased. */
+
+  for(i = 0; i < SPM_PAGESIZE; i += 2) {
+    /* Set up little-endian word. */
+    
+    uint16_t w = *buf++;
+    w += (*buf++) << 8;
+    
+    boot_page_fill(page + i, w);
+  }
+  
+  boot_page_write(page);      /* Store buffer in flash page. */
+  boot_spm_busy_wait();       /* Wait until the memory is written. */
+  
+  /* Reenable RWW-section again. We need this if we want to jump back
+   * to the application after bootloading. */
+  
+  boot_rww_enable();
+
+  /* Re-enable interrupts (if they were ever enabled). */
+
+  SREG = sreg;
+}
+/*---------------------------------------------------------------------------*/